We successfully use ant to create iOS projects. Basically, we need this to continue the integration (we use Jenkins). Most developers prefer to use the Xcode IDE, but some of them sometimes (I would say rarely) use ant to quickly create projects from the console after quick small changes.
Basically you need to call xcodebuild using ant task . But if you need more complex google examples for jenkins (or hudson) + xcode (or iOS, iPhone).
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